1.   Several days of unrest followed which spread across the country and involved thousands of students.

2.   There were nation-wide curriculum development projects in language, play, and early mathematics which involved thousands of teachers.

3.   But that investigation involved thousands of men giving blood.

4.   Although the study involved thousands of middle-aged female nurses, the same results have been found in a parallel study of male physicians to be published soon.

5.   Bracing the country for years of peacekeeping operations involving thousands of U.S. troops, Clinton declined to set a date certain for bringing American forces home from Kosovo.

6.   A number of studies involving thousands of patients in the United States and elsewhere are in progress.

7.   A series of scientific studies involving thousands of women have failed to turn up statistically significant evidence that silicone can cause diseases such as lupus and rheumatoid arthritis.

8.   Building a new car or jetliner involves thousands of designers, suppliers and engineers scattered across several continents.

9.   But dropping the big ones was a minor headache compared to a migraine sequence involving thousands of tiny objects.

10.   But the four brokers running the system rarely handled more than a few dozen trades an evening, involving thousands rather than millions of dollars.